package com.awesome.spring.service;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @program: awesome-spring
 * @description: 对账逻辑
 * @author: Alex Wu
 * @createDate: 2025-02-13 17:22
 **/
@Service
@Slf4j
public class CheckAccountService {

//    @Autowired
//    private TransactionRecordMapper transactionRecordMapper;  // 本地交易记录表

//    @Autowired
//    private ExternalTransactionService externalTransactionService;  // 模拟外部支付系统

    @Scheduled(cron = "0 0 23 * * ?")  // 每晚 23:00 运行
    public void reconcileTransactions() {
        log.info("🔍 开始执行每日对账任务...");

       /* // 1. 获取当天交易记录
        LocalDate today = LocalDate.now();
        List<TransactionRecord> localRecords = transactionRecordMapper.getTransactionsByDate(today);
        log.info("📌 查询到本地交易记录: {} 条", localRecords.size());

        // 2. 获取外部支付系统交易记录
        List<TransactionRecord> externalRecords = externalTransactionService.getTransactionsByDate(today);
        log.info("🌍 查询到外部交易记录: {} 条", externalRecords.size());

        // 3. 对比本地与外部记录
        List<TransactionRecord> mismatches = compareTransactions(localRecords, externalRecords);
        if (mismatches.isEmpty()) {
            log.info("✅ 对账成功，所有交易匹配！");
        } else {
            log.warn("⚠️ 对账失败！发现 {} 条异常交易: {}", mismatches.size(), mismatches);
            saveMismatchReport(mismatches);  // 记录异常交易
        }*/

        log.info("📊 每日对账任务完成！");
    }

    /**
     * 比对本地与外部系统的交易数据
     */
    /*private List<TransactionRecord> compareTransactions(List<TransactionRecord> local, List<TransactionRecord> external) {
        Map<String, TransactionRecord> localMap = local.stream()
                .collect(Collectors.toMap(TransactionRecord::getTransactionId, t -> t));
        Map<String, TransactionRecord> externalMap = external.stream()
                .collect(Collectors.toMap(TransactionRecord::getTransactionId, t -> t));

        List<TransactionRecord> mismatches = new ArrayList<>();

        for (String transactionId : localMap.keySet()) {
            TransactionRecord localRecord = localMap.get(transactionId);
            TransactionRecord externalRecord = externalMap.get(transactionId);

            if (externalRecord == null || !localRecord.equals(externalRecord)) {
                mismatches.add(localRecord);
            }
        }
        return mismatches;
    }*/

    /**
     * 记录异常交易（可扩展为发送邮件/告警）
     */
   /* private void saveMismatchReport(List<TransactionRecord> mismatches) {
        // 这里可以存入数据库，也可以发送邮件告警
        mismatches.forEach(mismatch -> log.warn("❌ 交易异常: {}", mismatch));
    }*/
}
